This video shows how to lock apps in memory and keep them running in the background.
This ensures that notifications will work.


Flyme Memory Optimization


https://www.youtube.com/watch?v=ljHzpGhBFgc



*note:
  
I removed some Meizu apps through ADB to make FlymeOs run     better.

Removed apppackages :

com.meizu.safe ( and BatteryManager )
com.meizu.powersave

Meizu Security app does a very poor job in managing apps in background and notification management also.
By removing this through ADB you'll keep OTA functionality and a much better memory ( by Android ) management.

Swipe through the recent apps list and lock all apps you want to keep running in the background and receive notifications from.


Additional apps removed :

com.emoji.keyboard.touchpal
com.xrom.intl.appcenter
com.android.browser
com.google.android.apps.tachyon
com.meizu.net.search
com.meizu.flyme.weather


*Unused Memory is a waist of Memory!*